Create a deprecator for the library and register it with the Rails app

We can no longer use a single deprecator instance from Active Support,
instead each library should create their own and register with the app
so the application deprecators can control things like silencing and
other behaviors across the board.

CHANGELOG.md

@@ -1,6 +1,7 @@
 ## Unreleased
 
 * Add support for Rails 7.1. (no changes required.)
+* Add `HasScope.deprecator` to integrate with new application deprecators in Rails 7.1.
 
 ## 0.8.1
 

lib/has_scope.rb

@@ -11,6 +11,10 @@ module HasScope
     default: [[ String, Numeric ]],
   }
 
+  def self.deprecator
+    @deprecator ||= ActiveSupport::Deprecation.new("1.0", "HasScope")
+  end
+
   def self.included(base)
     base.class_eval do
       extend ClassMethods
@@ -201,7 +205,7 @@ def apply_scope_to_action?(options) #:nodoc:
   def applicable?(string_proc_or_symbol, expected) #:nodoc:
     case string_proc_or_symbol
     when String
-      ActiveSupport::Deprecation.warn <<-DEPRECATION.squish
+      HasScope.deprecator.warn <<-DEPRECATION.squish
         [HasScope] Passing a string to determine if the scope should be applied
         is deprecated and it will be removed in a future version of HasScope.
       DEPRECATION
@@ -222,6 +226,8 @@ def current_scopes
   end
 end
 
+require 'has_scope/railtie' if defined?(Rails)
+
 ActiveSupport.on_load :action_controller do
   include HasScope
   helper_method :current_scopes if respond_to?(:helper_method)

lib/has_scope/railtie.rb

@@ -0,0 +1,10 @@
+require 'rails/railtie'
+
+module HasScope
+  class Railtie < Rails::Railtie
+    initializer "has_scope.deprecator" do |app|
+      app.deprecators[:has_scope] = HasScope.deprecator if app.respond_to?(:deprecators)
+    end
+  end
+end
+

test/has_scope_test.rb

@@ -57,7 +57,7 @@ def apply_scopes(*)
       if params[:eval_plant]
         super
       else
-        ActiveSupport::Deprecation.silence { super }
+        HasScope.deprecator.silence { super }
       end
     end
 
@@ -175,7 +175,7 @@ def test_scope_with_eval_string_if_and_unless_options_is_deprecated
     Tree.expects(:eval_plant).with('value').returns(Tree)
     Tree.expects(:all).returns([mock_tree])
 
-    assert_deprecated(/Passing a string to determine if the scope should be applied is deprecated/) do
+    assert_deprecated(/Passing a string to determine if the scope should be applied is deprecated/, HasScope.deprecator) do
       get :index, params: { eval_plant: 'value', skip_eval_plant: nil }
     end